I'm honestly not a Theo Johnson fan. Not nearly enough production for his measurables, not much of a YAC threat, and he's utter shit as a run-blocker.
Sanders and Holker at least have that YAC mentality and production.
You could at least make a theory that mermaids (and other various sea creatures) simply haven't been discovered yet; the ocean is a vast place, and we haven't even mapped a quarter of the Pacific alone, let alone the Indian and Arctic Oceans.
Believing that "baby birds don't exist because I haven't seen them" is just...wrong. It's not even needed to be scientifically refutable; it's just dead - fucking - wrong.